{"version_information": {"version": "det_AHW_v1.1", "compiled_date": "2026-04-05 16:16:06.810854", "data_source": "ERA5", "website": "http://wexa.jamstec.go.jp", "Author": "Patrick Martineau"}, "event_id": {"name": "Event ID", "description": "A unique identifier based on: beginning_date, end_date, longitude, and latitude", "value": "2021-Dec-08_to_2021-Dec-11_148.0_-31.0"}, "event_label": {"name": "Event label", "description": "Integer-valued grid identifier that uniquely labels each detected extreme event in space and time, consistent with the corresponding labels stored in the NetCDF dataset.", "value": 2021120000320}, "status": {"name": "Status", "description": "An ongoing event denotes an event that lasts up to the latest data available. These events are subject to change as newer data is added.", "value": false}, "start_date": {"name": "Start date", "description": "First date on which grid points are under the influence of an event", "value": "December 08 2021"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "December 11 2021"}, "duration": {"name": "Duration", "description": "Time elapsed (days) from the start date to the end date", "value": 4}, "figures_available": {"name": "Figures available", "description": "True if figures were pre-generated for this event", "value": true}, "detection_var": {"name": "Detection variable", "description": "Variable used for the detection scheme", "value": "t2m"}, "event_type": {"name": "Event type", "description": "Type of the event detected", "value": "Cold spell"}, "area": {"name": "Area", "description": "The area (in square meters) encompassing all grid points under the influence of an event during its lifetime.", "value": 68029.65711271929}, "countries_affected": {"name": "Countries affected", "description": "The ArcGIS geocoding API (https://developers.arcgis.com/rest/geocode/) is used to obtain a list of all the countries affected by an event during its lifetime.", "value": ["Australia"]}, "continents_affected": {"name": "Continents affected", "description": "List of all continents affected", "value": ["Oceania"]}, "oceans_affected": {"name": "Ocean basins affected", "description": "The ArcGIS geocoding API (https://developers.arcgis.com/rest/geocode/) is used to obtain a list of all the ocean basins affected by an event during its lifetime.", "value": []}, "center_lat": {"name": "Center latitude", "description": "Latitude of the maximum time-integrated standardized t2m anomalies. Only t2m of the same polarity as the events are considered (positive T2m for a HW, for instance). The centre is thus representative of both the severity and persistence of anomalies.", "value": -31.0}, "center_lon": {"name": "Center longitude", "description": "Longitude of the maximum time-integrated standardized t2m anomalies. Only t2m of the same polarity as the events are considered (positive T2m for a HW, for instance). The centre is thus representative of both the severity and persistence of anomalies.", "value": 148.0}, "center_latf": {"name": "Center latitude", "description": "Formatted version of center longitude", "value": "148.0\u00b0E"}, "western_lon": {"name": "Westernmost longitude", "description": "Westernmost longitude affected by event", "value": 147.0}, "eastern_lon": {"name": "Easternmost longitude", "description": "Easternmost longitude affected by event", "value": 149.5}, "southern_lat": {"name": "Southernmost latitude", "description": "Southernmost latitude affected by event", "value": -34.5}, "northern_lat": {"name": "Northernmost latitude", "description": "Northernmost latitude affected by event", "value": -30.5}, "polygons_merged": {"name": "Merged polygon", "description": "Merger or polygons at each time step", "value": {"type": "MultiPolygon", "coordinates": [[[[149.25, -31.0], [149.15, -31.25], [149.18, -31.32], [149.25, -31.35], [149.5, -31.25], [150.03, -31.47], [150.25, -32.0], [150.15, -32.25], [150.25, -32.5], [150.15, -32.75], [150.25, -33.0], [150.15, -33.25], [150.25, -33.5], [150.15, -33.75], [150.25, -34.0], [150.03, -34.53], [149.68, -34.68], [149.53, -35.03], [149.0, -35.25], [148.47, -35.03], [148.25, -34.5], [148.35, -34.25], [148.25, -34.0], [148.43, -33.57], [148.0, -33.75], [147.75, -33.65], [147.5, -33.75], [146.97, -33.53], [146.75, -33.0], [146.85, -32.75], [146.75, -32.5], [146.85, -32.25], [146.82, -32.18], [146.47, -32.03], [146.25, -31.5], [146.35, -31.25], [146.25, -31.0], [146.47, -30.47], [146.82, -30.32], [146.97, -29.97], [147.5, -29.75], [147.75, -29.85], [148.0, -29.75], [148.53, -29.97], [148.68, -30.32], [149.03, -30.47], [149.25, -31.0]], [[148.85, -33.25], [148.82, -33.18], [148.7, -33.13], [148.57, -33.43], [148.82, -33.32], [148.85, -33.25]]]]}}, "IPCC_regions": {"name": "IPCC regions", "description": "List of all IPCC regions affected", "value": ["E.Australia", "S.Australia"]}, "polygons": {"name": "Polygons", "description": "Polygon vertices describing the boundary of the event at each time step", "value": {"2021-12-08T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[146.25, -31.0], [146.47, -30.47], [146.82, -30.32], [146.97, -29.97], [147.5, -29.75], [147.75, -29.85], [148.0, -29.75], [148.53, -29.97], [148.75, -30.5], [148.65, -30.75], [148.75, -31.0], [148.65, -31.25], [148.75, -31.5], [148.65, -31.75], [148.75, -32.0], [148.65, -32.25], [148.75, -32.5], [148.65, -32.75], [148.75, -33.0], [148.53, -33.53], [148.0, -33.75], [147.75, -33.65], [147.5, -33.75], [146.97, -33.53], [146.75, -33.0], [146.85, -32.75], [146.75, -32.5], [146.85, -32.25], [146.82, -32.18], [146.47, -32.03], [146.25, -31.5], [146.35, -31.25], [146.25, -31.0]]]]}, "2021-12-09T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[146.25, -31.0], [146.47, -30.47], [146.82, -30.32], [146.97, -29.97], [147.5, -29.75], [147.75, -29.85], [148.0, -29.75], [148.53, -29.97], [148.68, -30.32], 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[149.03, -30.47], [149.25, -31.0], [149.15, -31.25], [149.18, -31.32], [149.25, -31.35], [149.5, -31.25], [150.03, -31.47], [150.25, -32.0], [150.15, -32.25], [150.25, -32.5], [150.15, -32.75], [150.25, -33.0], [150.15, -33.25], [150.25, -33.5], [150.15, -33.75], [150.25, -34.0], [150.03, -34.53], [149.68, -34.68], [149.53, -35.03], [149.0, -35.25], [148.47, -35.03], [148.25, -34.5], [148.35, -34.25], [148.25, -34.0], [148.47, -33.47], [148.82, -33.32], [148.85, -33.25], [148.82, -33.18], [148.5, -33.04], [148.0, -33.25], [147.47, -33.03], [147.32, -32.68], [146.97, -32.53], [146.75, -32.0], [146.85, -31.75], [146.75, -31.5]]]]}}}, "max_amp": {"name": "Maximum anomaly amplitude", "description": "Maximum t2m anomaly recorded over entire duration", "value": -8.80323503975552}, "mean_amp": {"name": "Mean anomaly amplitude", "description": "Mean t2m anomaly over entire duration", "value": -5.935753037994305}, "evo_areamean": {"name": "Evolution of mean t2m", "description": "The daily evolution of mean t2m.", "value": [19.344471211215534, 15.277572409263257, 16.585153531424623, 17.829970725119267]}, "evo_maxamp": {"name": "Evolution of maximum t2m", "description": "The daily evolution of maximum t2m.", "value": [17.65818806836768, 11.956263416263539, 9.994128735145182, 12.99202005697208]}, "anom_evo_areamean": {"name": "Evolution of mean t2m anomalies", "description": "The daily evolution of mean t2m anomalies.", "value": [-4.949739761214569, -7.342809411155857, -6.196517675943098, -4.293577459441376]}, "anom_evo_maxamp": {"name": "Evolution of maximum t2m anomalies", "description": "The daily evolution of maximum t2m anomalies.", "value": [-5.4277939353897295, -8.80323503975552, -7.308194957813214, -4.647400494831857]}, "anom_scaled_evo_areamean": {"name": "Evolution of mean standardized t2m anomalies", "description": "The daily evolution of mean standardized t2m anomalies.", "value": [-1.3564943726647114, -2.1096504131262375, -1.8909248289635048, -1.350391552160124]}, "anom_scaled_evo_maxamp": {"name": "Evolution of maximum standardized t2m anomalies", "description": "The daily evolution of maximum standardized t2m anomalies.", "value": [-1.4880576962732937, -2.4338622230647404, -2.2927270514073155, -1.4537352222574496]}}